All categories

3 years ago

I need help with this ;-; can someone help me how to get the answer as well?

Mathematics

2 answers:

Paraphin [41]3 years ago

7 0

Answer:

(3)》》》60°

Step-by-step explanation:

Since the exterior angle of a triangle is

equal to the sum of non-adjacent interior angles, we have

<DAB=<ABC +<BCA

》180-3x =(6x-40) + (x+20)

》180-31 - 3t sx-not x+20

》180-3x - 72-20

》7x+3x= 180+20

》10x=200

》x=20°

(Being complementory angles)

<DAB+ <BAC = 180°

》180-3×20°+<BAC=180

》<BAC=60°

Alekssandra [29.7K]3 years ago

7 0

Answer: 60°

Step-by-step explanation;

Sum of angles in a ∆=180°

We sum each of the angles and equate to 180°

(6x-40) + {180- (180-3x) }+ (X+20) =180

6x+3x+x-40+20=180°

10x-20=180°

10x=180+20

10x= 200° therefore, X=20

Substitution to solve <BAC

180-3x

180-3(20)

180-60

120

Applying angle in a straight line, we have

180-120

= 60°

You might be interested in

At the Tesla factory, a machine tests 1 out of every 75 windshields produced for quality. The machine requires a safety inspecti

Sloan [31]

Answer:

pretty sure it's 675

Step-by-step explanation:

could be wrong but if there are 303,750 windsheilds per year and the machine needs an inspection after every 450 you just divide them.

6 0

3 years ago

X + 2y = –6<br> 3x + 8y = –20

Kay [80]

What do you want to calculate?

CALCULATE IT!
Solve
Graph
Lesson

Problem:
Solve
x
+
2
y
=
−
6
;
3
x
+
8
y
=
−
20
Steps:
I will solve your system by substitution.
(You can also solve this system by elimination.)
x
+
2
y
=
−
6
;
3
x
+
8
y
=
−
20
Step: Solve
x
+
2
y
=
−
6
for x:
x
+
2
y
+
−
2
y
=
−
6
+
−
2
y
(Add -2y to both sides)
x
=
−
2
y
−
6
Step: Substitute
−
2
y
−
6
for
x
in
3
x
+
8
y
=
−
20
:
3
x
+
8
y
=
−
20
3
(
−
2
y
−
6
)
+
8
y
=
−
20
2
y
−
18
=
−
20
(Simplify both sides of the equation)
2
y
−
18
+
18
=
−
20
+
18
(Add 18 to both sides)
2
y
=
−
2
2
y
2
=
−
2
2
(Divide both sides by 2)
y
=
−
1
Step: Substitute
−
1
for
y
in
x
=
−
2
y
−
6
:
x
=
−
2
y
−
6
x
=
(
−
2
)
(
−
1
)
−
6
x
=
−
4
(Simplify both sides of the equation)
Answer:
x
=
−
4
and
y
=
−
1

3 0

3 years ago

3. Try It #3 Write the point-slope form of an equation of a line with a slope of -2 that passes through the point (-2,2). Then r

vova2212 [387]

Answer:

Point-slope form of equation given as $y-2=-2(x+2)$ .

Slope-intercept form of equation is given as $y=-2 x-2$ .

Step-by-step explanation:

In the question, it is given that the slope of a line is -2 and it passes from (-2,2).

It is asked to write the point-slope form of the equation and rewrite it as slope-intercept form.

To do so, first find the values which are given in the question and put it in the formula of point-slope form. Simplify the equation to rewrite as slope-intercept form.

Step 1 of 2

Passing point of the line is (-2,2).

Hence, $x_{1}=-2$ and

$y_{1}=2 \text {. }$

Also, the slope of the line is -2.

Hence, m=-2

Substitute the above values in point-slope form of equation given by $y-y_{1}=m\left(x-x_{1}\right)$

$\begin{aligned}&y-y_{1}=m\left(x-x_{1}\right) \\&y-2=-2(x-(-2) \\&y-2=-2(x+2)\end{aligned}$

Hence, point-slope form of equation given as y-2=-2(x+2).

Step 2 of 2

Solve y-2=-2(x+2) to write it as slope-intercept form given by y=mx+c.

$\begin{aligned}&y-2=-2(x+2) \\&y-2=-2 x-4 \\&y=-2 x-4+2 \\&y=-2 x-2\end{aligned}$

Hence, slope-intercept form of equation is given as y=-2x-2.

7 0

2 years ago

PLEASE HELP!!!!!<br> What is the unit rate for 644.8 ft in 31 s? Enter your answer as a decimal.

Kruka [31]

20.79 feet per second

5 0

3 years ago

Read 2 more answers

a school baseball team raised $810 for new uniforms. each player on the team sold one book of tickets. There were 10 tickets in

artcher [175]

the answer is 27 because all you have to do is divide 810 by 30 which equals 10 times three dollars at the equals 30 soda by 830 and 30 parts and equals 27 soap and try to answer or problem only calculator at home on your phone to add on your tablet on your computer and a half thank you

6 0

3 years ago

Read 2 more answers